Multiplex bag and method of forming the same



DY CID I 1 .il l /5 5 LI I 9 1932- s. M. PINKERTON, JR 1,830,277

MULTIPLEX BAG AND METHOD OF FORMING THE SAME Filed June 11. 1930 I5 Sheets-Sheet l 1 I i W l l l J//Z i w 1 l i ifiqs l I V glwwmtoz veflwmadjzwmmfia J Q L\ Oct. 4, 1932.

'S. M. PINKERTON, JR

MULTIPLEX BAG AND METHOD OF FORMING THE SAME Filed June 11. 1950 I5 Sheets-Sheet 2 Hq 6 MW Jmwmz Wgflmmzmgz. Q v /z? Oct. 4, 1932. s. M. PINKERTON. JR

MULTIPLEX BAG AND METHOD OF FORMING THE SAME FiLed June 11, 1930 Z5 Sheets-Sheet 3 Ho 9 gwuamto'a flnma yc.

Y %&W@@%% W wozmq 20 i used to form a covering and the others may Patented Oct. 4, 1932 uNiT o STATES PATENT OFFICE SHERWOOD M. P INKERTON, JR., F TOLEDO, OHIO, ASSIGNOR TO THE PINKEBTON TOBACCO COMPANY, OF TOLEDO,

OHIO, A CORPORATION OF OHIO MULTIPL EX BAG- AND METHOD OF FORMING THE SAME Application filed June 11,

withdrawn in relatively small quantities and wherein flexibility of the walls render the bag convenient for-containing material While the material is being utilized or consumed.

In the formation of the bag, a plurality of plies of flexible paper, one or. more of which may be formed of a tough paper, are

be formed substantially waterproof, or semiwaterproof, or proof as against the escape of anyelement or ingredient of the material dispensed in the bags, and may be used as liners. The sheets of paper are secured together to completely enclose the material by the proofing material, while, at the same time, the tougher covering material is utilized for the protection of the'package as' a whole. Thus, the'bag may be formed of relatively thin paper and, by reason of the multiplex structure, the walls are pliable which enables easy filling and package formation of the bag, and'renders it exceedingly convenient for-the removal of the material asit is consumed.

'The bag blanks are provided with flaps for connecting the sides of the bag together by the use of cementitious material, or glue. Thescementitious material operates to stiflen and render rigid the portions of the bags to which. itis applied and, where a plurality of 1. layers offcementitious material are used to secure the sheets of a multiplex bag together 1930. Serial No. 460,492.

and to secure the contiguous portions of the side walls of the bag, the stiffness and rigidity is correspondingly increased. In order to reduce gluing or cementing operations of the bag, which ordinarily is increased by the use'of multiple sheets, one or more layers of the bag are formed to have exposed areas between portions of an adjoining layer. Thus the edges of the layers may be serrated, or perforated, within the contacting areas of the layers and contiguous portions of the side walls of the bag. By perforating the edge portions of one or more of the layers, the layers of glue used is reduced. A single stripe or streak of glue, passing over the perforated region, may be suflicient to secure the layers together and also secure the side walls and produce thebag formation, consequently, this method of forming the bag greatly reduces the cost of production of the bags and enables the formation of the bag having the desired flexibility in all of its parts.

The invention may be contained in bags used for a great variety of purposes and the bags may be varied in their details of construction. Also, methods involving the use of myinvention may difler from each other. To illustrate a practical application of the invention, I have selected three bags as examples of those that contain my invention, and shall describe the bags and the method of forming the same hereinafter. The bags selected for purposes of illustration are shown in the accompanying drawings.

Fig. 1 illustrates a view of bag blank sheets laced in position for formation of one of the ags. Fig. 2 illustrates parts'of the strips, shown in Fig. 1, folded into position. Fig. 3 illustrates a side view of the formed bag. Fig. 4 illustrates the relative location of sheets of flexible paper used in forming the second bag. Fig. 5 illustrates parts of the layers shown in Fig. 4 folded into position. Fig. 6 illustrates a side view of the bag when completed. Fig. 7 illustrates the relative po- 90 sitions of sheets of paper used to produce the third form of bag. Fig. 8 illustrates the parts of the layers folded into position. Fig.

9 illustrates a side view of the bag as finally formed.

In. forming the bag, illustrated in Figs. 1, 2, and 3, the layers are cut to the required shape from strips of sheet material having the desired characteristics, one to form the cover of the bag, and the other to form the liner. If desired, additional layers may be located intermediate the liner and the cover to increase thetoughness or proot'ness of the bag and. yet maintain its flexibility. In the particular hag shown in Figs. 1, 2, and 3, a liner 1 is formed of a flexible paper that may be waterproof, or semiwaterproof, or of a material that is characteristically suitable for enclosing the particular material that is to be dispensed in the bags. The cover 2 may be formed of a tough, yet flexible, paper which forms a protecting layer for the package that is produced when the bag is finally formed and filled.

The layers or sheets that form the bag are secured together by means of a cementitious material, such as glue. To reduce the stiffening produced by a plurality of layers, or stripes of glue, the strips, from which the bag blanks are .cut, are perforated or serrated to form a plurality of contacting areas of both the cover and liner of one side of the bag with the liner, or with the cover, or with both the liner and the cover, of. the other side of the bag.

In the form of bag shown in Figs. 1, 2, and 3, the cover strip is punctured to form oblong openings 3 along its side edges: in advance of shaping the blank. The ends of the rows of openings may be, if desired, spaced apart the length of one side of the bag.

The strips of the liner 1, and the cover 2, may be secured together along contacting side edge portions by distributing the glue on i the side of either the liner or the cover that is brought into contact with the other layer. Thus, in the method of manufacture, cementitious streaks or stripes of glue may be located along the cover blank, or the liner blank, so as to locate the outer edges of the stripes of glue slightly remote from the edges of one side of the cover blank and so that in the operations of the machine, as the strips of material, from which the bag blanks are formed, .are brought together, the strip that forms the cover blank will be secured to the strip that fo gms the liner blank along portions of their side edges. The ends of the stripes of glue 5, along either edge, are preferably spaced apart substantially the length of the opposite side oi the bag. Thus, the liner and cover are secured together by the stripes: of glue 5 on one side of the bag only. This, however, is sulficient to maintain the desired relative location of the liner and the cover in the subsestrips in the forportions. The strips are also cut to form in- V clined edge portions 8 that oint the side edge portions of the narrow and wider portions of the strip.

The bag blanks are formed by cross-cutting the strips at each alternate juncture between the narrow and wider portions of the strip and so that each bag blank is provided with a narrow and wider portion. These portions form the sides of the bag and are referred to, hereinafter, as the narrower and wider sides of the bag blank. The wider sides of the bag blank are folded. along the line of the side edges of the narrow sides of the bag blank, such as indicated by the dotted lines 9, and so as to form the flaps 10. Glue is then placed on the inturned flaps 10. The glue will then pass through the openings 3 formed in the cover and so as to be placed also upon the flaps of the liner. The glue will spread outward on the liner, from the edges of the oblong openings 3 and, consequently, secure the liner at these points to the cover about the oblong openings 3. The bag blank is then folded along the dotted line 11 which joins the corners of the sloping edges 8 and the side edges of the narrow part of the bag blank and, when so folded, the edge portions of the narrow side of the bag blank will make contact with the flaps 10 and be secured by the glue 12 distributed over the flaps. Consequently, the liner 1 of the wider side of the bag blank, and also the cover 2 of the wider side of the bag blank, will be secured tothe liner 1 of the narrow side of the bag blank. Thus the liner, along edge portions of both sides of the bag, will be secured to the cover and displacement of the liner, relative to the sides of the cover, will be prevented.

In the form of bag blank shown in Figs. 4, 5, and 6, both strips from which the bag blanks are formed, are perforated, or serrated. The cover strip is perforated along the edges of the portions that form the wider side of the bags, and the liner strip is perforated along the edges of the portions that form the narrow sides of the bags. The rows of perforations, however, extend over lengths that are substantially the same as the length of the bag, and are located along lines substantially the same distance from the edges of the narrow sides and the wider sides of the strips, and so that when portions of the strips, along the side edges of the strips, are removed to form narrow and wider sides same;distancesfrom the folded lines that .the rows of openings in the liner are located. When glue is placed upon the folded flaps, the lue will cover portions of the liner of vthe aps of the, liner and, when the narrower a side isfolded onto the wider side of the bag blank, the perforations'of the liner will permit the cementitious material to spread upon the cover of the narrower side of the bag blank and, consequently, the liner and the cover of both sides of the bag blank will be cemented together.

The oblong openings 15 are formed in parallel lines in the liner of the strip 16 at points remote from the side edges of the strip from which the liner blank is formed, and the oblong openings 17 are formed along parallel lines near the edges of the cover strip. The distance between the ends of the rows of openings 15 andthe distance between the ends of the rows of the openings 17 are substantially the length of the bag. \Vhcn,

therefore, the flaps 18 are formed by folding along the lines of the edges of the narrower portion of the blank, the openings 17 will be located in the flaps 18 and, when the glue 19 is spread upon the flaps, it will pass through the oblong openings 17 and also spread upon the portions of the liner that form a part of the flaps 18 and distribute itself laterally from the areas of the openings 17 between the flaps of the cover and the flaps of the liner of the bag blank. When the narrow side of the bag blank is folded onto the wider side, and onto the flats 18, the glue will pass through the openings 15 and spread upon the cover as well as upon the liner and thus, the liner and cover, along edge portions of both sides of the bag, will be secured together by the stripes of glue 19 that are placed on the flaps 18. v

Preferably, the openings 15 are so located, with respect to the openings 17 that the side edges of the openings 15 overlap the side edges of the openings 17, when the bag is finally formed. The spaces between the openings of the narrow side of the bag blank are located in staggered relation, with respect to the spaces between the openings of the wider side of the bag blank, whereby there will be produced a union between the portion of the cover, that forms theflap, and the pornarrow side of the blank.

tion of the cover that forms the narrow side of the bag blank, and also a union between the portions of the liner that form the flap and the portions of the liner that form the This structure produces an exceedingly flexible bag construction and yet unites all parts of the bag together along its sides.

In the form of construction shown in Figs.

7, 8, and 9, the liner 1 is formed to have oblong openings 22 along parallel lines that are disposed parallel to each other, and somewhat remote from the side edges of the strip from which the liner is formed. The strip, from which the liner is formed, is somewhat wider than the strip from which the cover 2 is formed. The strips are placed so that their center lines register with each other which disposes the side edges 23 of the liner strip outside of the side edges 24 of the cover strip. -The strips are out to remove portions to form the narrow and wider sides of the bag blanks. The portions of the strips that form the'narrow sides of the bag blanks have the same'width. The liner of the wider side of the bag blank will be wider than the cover of that side of the bag blank, but the cover of that side will be wider than the side of the cover that forms the narrow side of the bag blank; When, therefore, the liner and cover of the wider side of the bag blank are folded along the line of the edges of the narrow side of the bag blank, inwardly turned flaps 26 will he formed. The flaps 26, of the liner, will be wider than the flaps 27 of the cover, so as to leave an exposed edge portionof the flaps 26 of the liner'l. The glue 28 is placed in'stripes on the part of the liner that forms the narrow side of the bag so as to spread on the cover 2, through the openings 22, and to spread laterally from the edges of the openings 22 to unitethe liner and the cover. The stripes of glue 28 are ,so located that their center lines are located in line with the edges of'the inturned flaps 27 and, consequently, when the bag blank is folded to form the bag, the glue will'spread over the exposed edge portion of the flaps 26, as well as over the edge portions of the flaps 27. Also, the openings 22am, preferably, located in line with the edgcs'of the inturned flaps 27. hen, therefore. the bag blank is folded to form the bag,

the celne'ntitious material 28 will spread over the edge portions of the flaps 26 and 27 and both the cover and the liner of the narrower portion of the bag blank will be secured tothe liner and the coverof the wider portions of the bag blank. I

I claim:

1. In a bag, a plurality of sheets folded transversely and forming the sides of the bag, the portions of the sheets that form one side of the bag having flaps extending inwardly with respect to the center line of the sheets, the flaps of the outer sheet of'one side of the bag having perforations, the edges of the other sheet of the other side of the bag having. perforations,-the edges of the sides cementitiously .secured together through the openings and the portions of the sheets adjoining the openings, the portions between the openings of the flaps and of the side of the bag other than the one' that has the flaps being located substantially in alignment and in overlapping relation to each other.

2. In a flexible bag, a plurality of flexible sheets folded transversely and forming the sides of the bag, the parts of the sheets that form each side of the bag having the same width, one of the sides of the bag having flaps, the flaps of one of the sheets of one of the sides having portions that are covered by the flaps of another of the sheets of the side and portions that are not covered by the last named flaps, one of the sheets on the other side of the bag having portions along its edges that cover edge portions of another sheet of the side of the bag and cut-out portions that expose edge portions of the last named sheet of the said other side of the bag and stripes of cementitious material for secur ing the uncovered portions and the contacting areas of the edge portions of the flaps and the sheets together by a single stripe of cementitious material extending along each side of the bag.

3. The method of forming flexible bags which consists in superimposing flexible strips, cutting the strips to form bag blanks having two side parts of different width, perforating the edge portions of the outer sheet of the wider sides of the bag blank, folding the wider sides of the bag blank along the lines of the edges of the other side parts to form inturned flaps, perforating edge portions of the inner sheets of the other side of the bag blank, applying stripes of cement to the perforated portions and folding the sheets transversely to secure the edges of both sheets and on both sides of the bag together by a stripe pf cementitious materiallocated along each side edge of the bag.

4. The method of forming flexible bags which consists in perforating a plurality of strips along their side edges in rows that in each strip are located in endwise spaced relation, superimposin the flexible strips and cutting the strips to orm bag blanks having two side parts of different width, folding one of the side parts along the lines of the side edges of the other side part to form inturned narrow flaps, the flaps of one of the sheets of one side of the bag having perforations that are located in alignment with the perforations of the other sheet of the other side of the bag, covering the perforated edge portions of one of the sides of the bag with cementitious material and folding the sheets centrally and transversely at the juncture of the sides to cementitiously secure the flaps of both sheets of one side of the bag to the edges of both sheets of the other side of the bag.

5. In a flexible bag, a plurality of flexible sheets folded transversely and forming the sides of a bag, one of the sides having flaps located along the side edges of the sheets on one side of the fold, the flaps of one of the sheets having portions exposed by the flaps of the other of the sheets, the said other of the sheets on the other side of the bag havmg portions on that side of the bag exposed by portions of the first named sheet and the said exposed portions of the said other side located in ahgnment with the exposed portions of the flaps when the flaps are folded 

